Lap desk



FIG. 1 is a front perspective view of a lap desk showing the design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a side elevational view thereof, the opposite side being a mirror image thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a front elevational view thereof.

The broken lines in FIGS. 1, 3, and 4-6 are for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a lap desk, as shown and described. 